1222142231 has 4 divisors (see below), whose sum is σ = 1222263000. Its totient is φ = 1222021464.

The previous prime is 1222142221. The next prime is 1222142261. The reversal of 1222142231 is 1322412221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1322412221 = 13 ⋅101724017.

It is a cyclic number.

It is not a de Polignac number, because 1222142231 - 2⁶ = 1222142167 is a prime.

It is a super-2 number, since 2×1222142231² = 2987263265587314722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222142221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43661 + ... + 65958.

It is an arithmetic number, because the mean of its divisors is an integer number (305565750).

Almost surely, 2^1222142231 is an apocalyptic number.

1222142231 is a deficient number, since it is larger than the sum of its proper divisors (120769).

1222142231 is a wasteful number, since it uses less digits than its factorization.

1222142231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120768.

The product of its digits is 384, while the sum is 20.

The square root of 1222142231 is about 34959.1508907182. The cubic root of 1222142231 is about 1069.1547845269.

Adding to 1222142231 its reverse (1322412221), we get a palindrome (2544554452).

The spelling of 1222142231 in words is "one billion, two hundred twenty-two million, one hundred forty-two thousand, two hundred thirty-one".